<template>
  <div v-if="operateType != 'view'" class="component-upload-image">
    <el-upload
      ref="imageUpload"
      multiple
      :action="uploadImgUrl"
      list-type="picture-card"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :on-remove="handleDelete"
      :show-file-list="true"
      :headers="headers"
      :data="{ projectId }"
      :file-list="fileList"
      :on-preview="handlePictureCardPreview"
      :class="{ hide: this.fileList.length >= this.limit }"
      accept="image/png, image/jpeg, image/jpg, video/*"
    >
      <i class="el-icon-plus" />
      <div slot="file" slot-scope="{ file }" class="upload-wrap">
        <span class="el-upload-list__item-actions">
          <span class="el-upload-list__item-preview" @click="handlePictureCardPreview(file)">
            <i class="el-icon-zoom-in" />
          </span>
          <span class="el-upload-list__item-delete" @click="handleDelete(file)">
            <i class="el-icon-delete" /></span>
        </span>
        <img
          v-if="filterType(file.url) == 'img'"
          class="img-wrap img-view"
          :src="file.url"
          alt="图片"
        >

        <video v-else :src="file.url" class="video-wrap" />
      </div>
    </el-upload>
    <!-- 上传提示 -->
    <div v-if="showTip" slot="tip" class="el-upload__tip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>

    <el-dialog
      :visible.sync="dialogVisible"
      title="预览"
      width="800"
      append-to-body
    >
      <img
        v-if="filterType(dialogImageUrl) == 'img'"
        :src="dialogImageUrl"
        style="display: block; max-width: 100%; margin: 0 auto"
        alt="图片"
      >

      <video v-else :src="dialogImageUrl" style="width:100%" controls />
    </el-dialog>
  </div>
  <div v-else class="component-upload-image">
    <el-image
      v-for="item in fileList"
      :key="item.fileId"
      class="previewImg"
      :src="item.url"
      fit="fill"
      :lazy="true"
      :preview-src-list="fileList.map(item => item.url)"
    />
  </div>
</template>

<script>
import { getToken } from '@/utils/auth'
import { mapState } from 'vuex'
export default {
  props: {
    value: [String, Object, Array],
    // 图片数量限制
    limit: {
      type: Number,
      default: 5
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 5
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ['png', 'jpg', 'jpeg']
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true
    },
    operateType: {
      type: String,
      default: 'edit'
    }
  },
  data() {
    return {
      number: 0,
      uploadList: [],
      dialogImageUrl: '',
      dialogVisible: false,
      hideUpload: false,
      baseMinioUrl: process.env.VUE_APP_MINIO_BASE_API,
      baseUrl: process.env.VUE_APP_BASE_API,
      uploadImgUrl: process.env.VUE_APP_BASE_API + '/safeUploader/uploadSafe', // 上传的图片服务器地址
      headers: {
        Authorization: 'Bearer ' + getToken()
      },
      fileList: [],
      projectId: this.$store.state.app.selectData
    }
  },
  watch: {
    value: {
      handler(val) {
        if (val) {
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(',')
          // 然后将数组转为对象数组
          this.fileList = list.map((item) => {
            if (typeof item === 'string') {
              item = { name: item, url: item }
            } else {
              item.url =
                this.baseMinioUrl + '/' + item.bucket + '/' + item.name
            }
            return item
          })
        } else {
          this.fileList = []
          return []
        }
      },
      deep: true,
      immediate: true
    },
    app: {
      handler(newVal, oldVal) {
        this.projectId = newVal.selectData
      },
      deep: true
    }
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize)
    },
    ...mapState(['app']),
    filterType() {
      return function(fileName) {
        let fileExtendName = ''
        if (fileName) {
          fileExtendName = fileName.split('.')[fileName.split('.').length - 1]
        }
        if (fileExtendName === 'mp4') {
          return 'video'
        } else {
          return 'img'
        }
      }
    }
  },
  methods: {
    // 上传前loading加载
    handleBeforeUpload(file) {
      let isImg = false
      if (this.fileType.length) {
        let fileExtension = ''
        if (file.name.lastIndexOf('.') > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf('.') + 1)
        }
        isImg = this.fileType.some((type) => {
          if (file.type.indexOf(type) > -1) return true
          if (fileExtension && fileExtension.indexOf(type) > -1) return true
          return false
        })
      } else {
        isImg = file.type.indexOf('image') > -1
      }

      if (!isImg) {
        this.$modal.msgError(
          `文件格式不正确, 请上传${this.fileType.join('/')}图片格式文件!`
        )
        return false
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize
        if (!isLt) {
          this.$modal.msgError(`上传图片大小不能超过 ${this.fileSize} MB!`)
          return false
        }
      }
      this.$modal.loading('正在上传图片，请稍候...')
      this.number++
    },
    // 文件个数超出
    handleExceed() {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`)
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
      if (res.code === 200) {
        this.uploadList.push({
          name: res.fileName,
          bucket: res.bucket,
          url: this.baseMinioUrl + '/' + res.bucket + '/' + res.fileName,
          fileId: res.fileId
        })
        this.uploadedSuccessfully()
        this.$emit('addNumData', res)
      } else {
        this.number--
        this.$modal.closeLoading()
        this.$modal.msgError(res.msg)
        this.$refs.imageUpload.handleRemove(file)
        this.uploadedSuccessfully()
      }
    },
    // 删除图片
    handleDelete(file) {
      const findex = this.fileList.map((f) => f.name).indexOf(file.name)
      if (findex > -1) {
        this.fileList.splice(findex, 1)
        this.$emit('input', this.fileList)
      }
      this.$emit('delNumData', findex)
    },
    // 上传失败
    handleUploadError() {
      this.$modal.msgError('上传图片失败，请重试')
      this.$modal.closeLoading()
    },
    // 上传结束处理
    uploadedSuccessfully() {
      if (this.number > 0 && this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList)
        this.uploadList = []
        this.number = 0
        this.$emit('input', this.fileList)
        this.$modal.closeLoading()
      }
    },
    // 预览
    handlePictureCardPreview(file) {
      this.dialogImageUrl = file.url
      this.dialogVisible = true
    },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = ''
      separator = separator || ','
      for (const i in list) {
        if (list[i].url) {
          strs += list[i].url.replace(this.baseUrl, '') + separator
        }
      }
      return strs != '' ? strs.substr(0, strs.length - 1) : ''
    },
    getFileList() {
      return this.fileList
    }
  }
}
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
  display: none;
}
// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
  transition: all 0s;
}

::v-deep .el-list-enter,
.el-list-leave-active {
  opacity: 0;
  transform: translateY(0);
}
::v-deep .el-upload-list__item-actions {
  z-index: 99;
}
::v-deep .upload-wrap {
  width: 146px;
  height: 146px;
  position: relative;
  .img-wrap,
  .video-wrap {
    width: 100%;
    height: 100%;
    z-index: 0;
  }
}
.review {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 9;
  width: 100%;
  height: 100%;
  background: rgba(4, 19, 53, 0.85);
  border-radius: 2px;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all 0.1s ease-in-out;
  animation: fadeIn 0.1s ease-in-out;

  span {
    cursor: pointer;
    font-size: 14px;
    font-weight: 400;
    color: #ffffff;
    line-height: 22px;

    &.mb8 {
      margin-bottom: 8px;
    }
  }
}

.previewImg {
  width: 148px;
  height: 148px;
  margin-right: 10px;
  margin-bottom:10px;
}
</style>
